Gas administering equipment



July 14, 1936. E. l. McKESSON I GAS ADMINISTERING EQUIPMENT Filed June20, 1952.

livering fluids.

Patented July 14:, 1936 RATE-NT OFFICE ZAM'LZEG GA'S ADEWSTEEBNGEQUIPMENT Elmer Application June 2%,

1 (Claim.

This invention relates conducting: and ele This invention has utilitywhen incorporated for elimination of electrical hazards and in thedelivering or" fluids controllably to a patient.

Referring to the drawing:

Fig. 1 is a fragmentary embodiment of the invention in an installationfor anaesthetizing a patient; v

Fig. 2 is a view 01' the delivery terminus or mask in the installationof Fig. l;

Fig. 3 is a section on the line m-m, F g. 2;

Fig. i is a partial section on the line Iii-IV, Fig. 2;

Fig. 5 is a section on the line V-V, Fig. 2;

Fig. 6 is a fragmentary bottom plan view of the mask, that is, from thereverse side to the showing of Fig. 2; and

Fig. 7 is a fragmentary view of the flexible passage member or duct tothe mask from the source of supply or machine.

Valve mechanism for controllably determining pressure and mingling ofsupply is shown as a machine l with which there is assembled metallicfitting 2 as an electrical conductor. This fitting 2 is a terminus forhose 3, shown as having a general fabric and rubber body 4, reinforcedinternally by helical metallic wire spring i, having end 6 thereofanchored with the terminal fitting 2 for a continuity of electricalconductivity throughout this hose 3 from the fitting 2 to the remotefitting l.

Additionally, internally of this hose body l there is herein providedlining t of electric conductivity efiectiveness. This lining ii inpractice is a rubber loaded with 50 per cent of apure carbon black,known to thetrade as Special Carbon P-33. There is, accordingly, in thishomogeneous lining 8 a degree of electrical conductivity effectiveagainst rise of any static charge or the existence of electrical tensionas an unbalanced condition, for the reason that any leakages fromelectrical sources or responses to radio conditions or flow of gases isdissipated uniformly by this electrical conductor lining B to thefittings 2, while any such tendency to promote or disturb conditionseven in the body 3 of the hose is minimized against hazard'by having thehelix 5 contact the lining and connected at its termini 6 with therespective fittings 2, 7.

In addition to meeting or anticipating hazard from such disturbedcondition in the conductor from the machine I, there is no occasion forannoyance of the patient 9 by the occurrence of any rpm a ent,

(iii. Elk-195) I. hicliieeson, Toledo, Dhlo, assignor F. lilcfieeeon,Toledo, @hio noise from the snapping or other electrically dimtubingfeatures. The attendant, as normally conducting the administration, isin position to touch the flesh of the patient as well as hold the hoseMore especially, there is a tendency with those administeringanaesthesia, to position body iii of the mask. This mask body iii isherein shown provided with tubular port It centrally thereof, which isassembled with metallic fitting it as a conductor having terminus itwhich may This mask body it is also shown as l has electricalconductivity throughout, and furthermore, is of a quality to submit todistortion and hold such shape. For instance, the width may be increasedby applying pressure transversely thereof inward. Contrariwise, tonarrow the mask in adapting it to the face of the patient, such pressuremay be applied to opposite sides, say adjacent rivets it having snapheads Iii. Additionally, these snap heads it may be engaged byconnection it about the head of the patient ii in locating the mask atthe mouth and nose of the patient when the mask is, as herein shown,adapted for oral and nasal use.

With this connection it an electrical conductor, there is dissipationdirectly to the cheek of the patient 9 so that no tendency for jumpingof the spark may be had to annoy the patient by the prickly sensation,nor to create the hazard of disturhing the patient nervously or thestill greater hazard of combustion in the event the administered gasesshould be of a nature to ignite, as mixtures of ether, acetylene,ethylene with nitrous oxide or oxygen.

As herein disclosed, this mask body it of plastic attributes andelectrical conductor properties, has vulcanized assembly connection H totubular cushion rim [8 of thin sheet rubber. This thin sheet ,rubber l8has passage it normally contoured and formed therein as the stablecondition Y 2 aoetgeie This stem 23 as externally threaded, has openingfrom the inner terminus thereof to lateral port 24.

Accordingly, in rotating the knurled head 22 by a turn or so as to thestem 20, the port 24 is exposed so that in applying pressure to thecushion l8, the normal content of air may be reduced, and then, with thechamber 59 thus collapsed or partially defiated, the valve may be closedby reverse operation of the knurled head 22. Accordingly, the degree ofsoftness for this cushion It? by gas quantity therein may be nicelydetermined for promoting comfort in fitting this mask at the face of thepatient 9. This comfort in fitting also is a factor against; leakage.This cushion then is not loaded with electrical conductivity to theextent of in itself precluding static charge to be isolated therein awayfrom the patient. As before suggested, this electrical chargeaccumulation against hazard may be dissipated by the connection IE or bythe hand of the operator engaging such mask body 10.

The patient 9 inhales in receiving supply from the machine. I and thenexhales. may in part flow back toward the machine i. More or less of theresidue may be exhausted. To

' this end, the fitting l2 has located therein sleeve 25 having internalshoulder 26 against gasket 21. As protruding beyond this fitting 12,this sleeve 25 has externally threaded portion 28. This portion 28 maybe engaged by internally threaded portion 29 of flanged housing 38. Inthis assembly the housing 30 may clamp gasket 3! in a position to opposethe gasket 21.

Thishousing 30 has ledge or seat 3| beyond the terminus of the sleeve25. Against this seat 3|, disk 32 is freely rockable into snug closingposition.

This disk 32 is provided with stem 33 engaged by screw 34 looselyassembling this disk 32 with arm 35. This arm 35 has depending paralleleyes 36 providing bearings loosely about shaft 31. The arm 35 has eye 38which may be engaged by hooked terminus 39 of torsion spring 40 wrappedabout the shaft 31 and having its remote terminus 4i coacting withradially extending slot 42 longitudinally of the shaft 31. Thisshaft 31has at one end, head 43 loosely mounted in nut 44 as a bushing in theframe 30. Notches 45 permit rotation of this bushing and therebydetermine the pull action of the head 43 on the shaft 31 remote from thehead 43. This shaft 31 as protruding from the opposite side of the frame38 has seat 45 with which may coact set screw 4'1 through The exhalationknurled er wheel 48. This means that the wheel 68 as manually rotatedangularly shifts the shaft 3?. angular shifting is determined.

In one direction at stop 49 to engage the set screw 31, the wheel 48 hasits graduations 50 with zero registered at indicator point 5!. This maybe an adjustment for ready exhalation exhaust. If it be desired to havethe exhalation exhaust, say at 5 millimeters of mercury pressure, theknurledwheel 48 may be turned to have the graduation 5 at the pointer51; for 10 millimeters of mercury pressure, at the point ill; and for 20millimeters of mercury pressure, at the point 20.

It is thus seen there is provided a ready means for adjusting thepressure at which the disk 32 may be lifted. This adjustment is africtional loading for the wheel 48 is spaced from the frame 30 byconcave-convex spring washer 52 having slot portion 53 astride the stop49.

Accordingly, this disk or washer 52 oilers resistance against readyshifting ofthe adjusting wheel 48, while this wheel 48, as hand-turned,increases the torsion of the spring 40. This angular adjustment and itsfriction is entirely independent of the adjustment'of the spring 40 asto the resistance of the movement of the arm 35. Adjustment of thebushing 44 may determine the frictional holding at adjustment of thewheel 48 independently of disturbing the spring 48. The adjustments ofthe spring 40 are such that as the arm 35 moves it is at all times, withits loose disk 32, free to move to an open position; which, as an openposition is the same whether the adjustment at the graduations 58 be forzero or 20 millimeters of mercury.

It is. thus seen that with a compact simple exhaust valve, there is acontrol for exhalation which may nicely be adjusted over the practicalrange for operation and with patients; and that, in this operation, themanipulation is with elimination of electrical hazards from combustionor annoyance to the patient.

What is claimed and it is desired to secure by Letters Patent is:

Gas administering equipment embodying a respiration hose of flexibleplastic body, having a helical metallic reinforcement, and terminalmetallic fittings connected with the reinforcement terminally anchoredin the fittings and therebetween fully embedded in the walls of the aplastic hose for maintaining reinforcement flexibility for the fulllength of the hose.

ELMER I. McmSSON.

